Add README files for various applications: Decidim, Discourse, Example Admin, Example App, Ghost, Immich, Keila, Lemmy, Listmonk, Loomio, Matrix, Memcached, MySQL, Open WebUI, OpenProject, PostgreSQL, Redis, and vLLM

lemmy/README.md

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+# Lemmy
+
+Lemmy is a selfhosted social link aggregation and discussion platform. It is an open-source alternative to Reddit, designed for the fediverse.
+
+## Dependencies
+
+- **PostgreSQL** - Database for storing communities, posts, and comments
+
+## Components
+
+Lemmy runs three separate services:
+
+- **Backend** - Rust API server handling federation and data
+- **UI** - Web frontend for browsing and interacting
+- **pict-rs** - Image hosting and processing service
+
+## Configuration
+
+Key settings configured through your instance's `config.yaml`:
+
+- **domain** - Where Lemmy will be accessible (default: `lemmy.{your-cloud-domain}`)
+- **storage** - Persistent volume for application data (default: `10Gi`)
+- **pictrsStorage** - Persistent volume for uploaded images (default: `50Gi`)
+- **SMTP** - Email delivery settings inherited from your Wild Cloud instance
+
+## Access
+
+After deployment, Lemmy will be available at:
+- `https://lemmy.{your-cloud-domain}`
+
+## First-Time Setup
+
+1. Add and deploy the app:
+   ```bash
+   wild app add lemmy
+   wild app deploy lemmy
+   ```
+
+2. Create your admin account through the web interface
+
+3. Set up your first community and customize your instance settings